程序代码：

 private void timer1_Tick(object sender, EventArgs e)
        {
            progressBar1.Value += 1;
            if (progressBar1.Value==100)
            {
                timer1.Enabled = false;               
                
            }

        }
        
        private void Form1_Load(object sender, EventArgs e)
        {
            timer1.Interval = 30;
        }